<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>hello word</title>
	</head>
	<body>
		<h1>一级标题</h1>
		<h2>二级标题</h2>
		<h3>三级标题</h3>
		<h4>四级标题</h4>
		<p id="p1">段落一</p>
		<p id="p2">段落二</p>
		<p id="p3">段落三</p>
		<p id="p4">段落四</p>
	</body>
	<style>
		#p1{
			font-size: 50px;
			color:red;
		}
		#p2{
			
		}
	</style>
</html>
